Question about power distribution block usage in an industrial control panel

We have a panel that is to be supplied with a 225amp breaker where mutliple fused circuits of 15 amps each will be utilized from a power distribution block. The main conductor will come from the 225 amp breaker and feed directly to the power distribution block. Individual #12AWG wires from the other side of the power distribution block will feed a series of 15amp fuses.

The NEC code sections for tapping of a power distribution block list sections for various wire lengths from the power distribution block to the fuses supplying the branch circuits.